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0 0 <br />protection, but should be considered as preliminary at this tune, pending completion of the <br />recommended PHABSIM analysis in 2009. Recommendations developed using the PHABSIM <br />approach will be more ecologically -based as they take into consideration the specific physical <br />habitat requirements of the trout species and life stages residing within MC. The weighted - usable <br />area versus flow plots developed for each species and life stage will provide greater insight into <br />the benefits of protecting different stream flow levels and allow the trade -offs of different fixture <br />water development scenarios to be more thoroughly evaluated. Further, the extended spatial <br />(multiple transects and habitat types) and temporal (3 flow levels field- measured) coverage <br />afforded by PHABSIM will provide more comprehensive and defensible instream flow <br />recommendations. <br />Finally, based upon the degraded habitat condition observed resulting from the excessive <br />accumulation of finer sediments, I recommend flushing flow recommendations also be <br />developed for MC to assure protection of at least a portion of the annual high flow runoff Such <br />high magnitude, short term . flow events can "flush" accumulated fine sediments from the stream <br />bed and help to improve and/or maintain overall trout Habitat quality. The analysis necessary to <br />develop such recommendations would use the hydraulic data already being collected at the <br />PHABSIM transects in conjunction with a bed load transport model such as described by Parker <br />(1990). The programs needed for this modeling effort are already contained within the <br />WinXSPRO software package and would require little additional time and expense. <br />Literature Cited: <br />Annear, T. C. and A. L. Conder. 1983. Evaluation of instream flow methods for use in Wyoming. <br />Completion Report, Wyoming Game and Fish Department, Cheyenne, WY. <br />Bovee, K. D. 1997. Data collection procedures for the Physical Habitat Simulation System. U. S. <br />Geological Survey, Biological Resources Division, Mid- Continent Ecological Service <br />Center, Fort Collins, CO. <br />Hardy, T., P. Panja and D. Mathias. 2005. WinXSPRO, a cross - section analyzer, user's manual, <br />Version 3.0. USDA Forest Service, Rocky Mountain Research Station, General Technical <br />Report RMRS- GTR -147. Fort Collins, CO. <br />Nehring, B. 1979. Evaluation of instream flow methods and determination of water quantity <br />needs in the state of Colorado. CO Division of Wildlife, Fort Collins, CO. <br />Parker, G. 1990. Surface -based bed load transport relation for gravel rivers. Journal of Hydraulic <br />Research, IA HR 28:4. <br />Pfanl=h, D. J. 1975. Stream reach inventory and channel stability evaluation, a watershed <br />management procedure. USDA Forest Service, Northern Region, Missoula, MT. <br />Roach, W. J. 2008. Letter to L. Bassi and J. Baessler, Colorado Water Conservation Board, <br />Denver, CO. Trout Unlimited, Colorado Water Project, Boulder, CO, February 13. <br />U. S. Geological Survey. 2001.Open File Report 01 -340, Mid - Continent Ecological Science <br />Center, Fort Collins, CO. <br />Wesche, T. A. And P. A. Rechard. 1980. A summary of instream flow methods for fisheries and <br />related research needs. Eisenhower Consortium Bulletin 9, 122. <br />PRIVRECIED AND CONFIDENTIAL <br />ATTORNEY WORK PRODUCT <br />ATTORNEY- CLIENT COMMUNICATION 3 Monism Ckin ono. IVpd <br />Appendix B <br />